[struts]Action为什么找到了但是没有执行？

Question

LogonAction.java:package app;import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionServlet;public final class LogonAction extends Action{
        //Validate credentials with busines tier
        /*
        public boolean isUserLogon(String username,String password)
                          throws UserDirectoryException{
                return (UserDirectory.getInstance().isValidPassword(username,password));
        }
        */
        public boolean isUserLogon(String username,String password){
                System.out.println(username+":"+password+" log on ...");
                if ((username=="TUD")&&(password=="Hustle"))
                {
                        return true;
                }
                else
                        return false;
        }        public ActionForward perform(ActionMapping mapping,ActionForm form,HttpServletRequest Request,HttpServletResponse Response)
                                throws IOException,ServletException{
                //Obtain username and password from web tier
                System.out.println("perform");
                String username=((LogonForm)form).getUsername();
                String password=((LogonForm)form).getPassword();
                //Validate credentials
                boolean validated=false;
                try{
                        validated=isUserLogon(username,password);
                }
                catch(Exception ude){
                        //couldn't connect to user directory
                        ActionErrors errors=new ActionErrors();
                        errors.add(ActionErrors.GLOBAL_ERROR,new ActionError("Error.logon.connect"));
                        saveErrors(Request,errors);
                        //return to input page
                        return (new ActionForward(mapping.getInput()));
                }
                //Save our logged-in user in the session,because we use it again later.
                HttpSession session=Request.getSession();
                session.setAttribute(Constants.USER_KEY,form);
                //Log this event,if appropriate
                //if (servlet.getDebug()>=Constants.DEBUG)
                {
                        StringBuffer message=new StringBuffer("LogonAction:User'");
                        message.append(username);
                        message.append("' logged on in session");
                        message.append(session.getId());
                        servlet.log(message.toString());
                }
                //return success
                System.out.println("welcome"+Constants.WELCOME);
                return (mapping.findForward(Constants.WELCOME));
        }
}                         
       
-------------------------------------------------------------------------------------Constants.java中定义了Constants.WELCOME、Constants.SUCCESS等。perform()一开始就加了打印语句，但是控制台里却没有打出来。

Answer 1

你struts-config.xml中的action中怎么没有<forward>元素，你要ation往哪跳转啊。

Answer 2

转向的问题，你再仔细看看  return (mapping.findForward(Constants.WELCOME));在.do中对应的有没有一个.jsp页面，是不是完全的对应

Answer 3

rickhunterchen(千山鸟飞绝) ( ) 信誉：100  2006-05-12 12:07:00  得分: 0  
    你struts-config.xml中的action中怎么没有<forward>元素，你要ation往哪跳转啊。
  
 
Struts In Action中就是这样写的。
我理解的是在应用的LogonAction中根据应用处理的情况forward，比如最后一句：
return (mapping.findForward(Constants.WELCOME));

Answer 4

to BlackSnail(粉红海蜗牛) 
在你的struts-config.xml配置文件中的action也要有相应的 <forward name="welcome" path="/success.jsp">元素，不然就出现你的错误。

Answer 5

struts-config.xml改成这样了，tomcat重启了，现象如故。
我觉得我肯定是忽略了什么，要不然我照着网上做了好几个例子都是这样。
映射关系之类我也检查了，觉得没什么错了啊。<?xml version="1.0" encoding="ISO-8859-1" ?><!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd"><struts-config>
    <form-beans>
     <form-bean name="logonForm"
      type="app.LogonForm"/>
    </form-beans>
<!-- ========================================= Global Exception Definitions -->    <global-exceptions>
        <!-- sample exception handler
        <exception
            key="expired.password"
            type="app.ExpiredPasswordException"
            path="/changePassword.jsp"/>
        end sample -->
    </global-exceptions>
<!-- =========================================== Global Forward Definitions -->    <global-forwards>
        <forward
            name="logon"
            path="/Logon.do"/>
        <forward 
            name="welcome"
            path="/Welcome.do"/>
        <forward
         name="LogonSubmit"
         path="/LogonSubmit.do"/>
    </global-forwards>
<!-- =========================================== Action Mapping Definitions -->    <action-mappings>
            <!-- Default "Welcome" action -->
            <!-- Forwards to Welcome.jsp -->
        <action
            path="/Welcome"
            forward="/pages/Welcome.jsp"/>

<action
            path="/Logon"
            forward="/pages/logon.jsp"/>
            
        <action
            path="/LogonSubmit"
            type="app.LogonAction"
            name="logonForm"
            scope="request"
            validate="false"
            input="/pages/logon.jsp"/>
        
    </action-mappings>
<!-- ============================================= Controller Configuration -->    <controller
       processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>
<!-- ======================================== Message Resources Definitions -->    <message-resources parameter="MessageResources" />    <plug-in className="org.apache.struts.tiles.TilesPlugin" >      <!-- Path to XML definition file -->
      <set-property property="definitions-config"
                       value="/WEB-INF/tiles-defs.xml" />
      <!-- Set Module-awareness to true -->
      <set-property property="moduleAware" value="true" />
    </plug-in>
  <!-- =================================================== Validator plugin -->  <plug-in className="org.apache.struts.validator.ValidatorPlugIn">
    <set-property
        property="pathnames"
        value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
  </plug-in></struts-config>